Track-drill.



A. R. PAULUS.

TRACK DRILL.

APPLIoATIoN FILED snPT.1,19os.

1,034,825. i Patented Aug. 6,1912.

3 SHEETS-SHEET 1.

, l Imm f' TRACK Diam.. APYLIOATION FILED SEPT. 7, 1905.

Patented Aug. 6, 1912.

3 4SHBHTB--SHIIIIT 2.

` 'f gam,

A. R. PAULUS.

'ruck 1mm.. APPLIoATIox rI'Lnn ssn. 1, nos.

1,034,825.' mma Aug. ma

3 SHEETS-BIBB! l( ffw/ IME@ v 'Lv-N provided. if desired, upon the otherend ofv vided with rearwardly extending portionsv 34 that are connectedby pivot bolts 35 (see Fig. 6) to the side bars 10 of the base. A Ipairof hooks 36 for engaging the rail, are connected by a cross bar 37andareivotally connected at their rear ends by bo ts 38 to the rearwardlyextending portions 34 of the uprights 37. The upright frame and hooks-are adapted to swing rearwardly upon their pivots and 38 to permit thepassage `of trains without removing the drill from position. The lowerends of the side bars 27 are provided with shoulders 39 that rest uponthe side bars 10 of the base when the upright frame is in operativeposition. This tramevis also securely held in its upright position by .apair of jointed braces 40. the sections of which are pivoted to the sidebars 27 of the upright frame and to the rear ends of the side bars-10 ofthe base.

The construction of parts thus far described is similar to those of theprior patlented construction an `need not be more fully set forth here.In the prior construction however, the speed of the drill stock couldnot be varied relatively to that of the driving crank shaft. In drillingholes of f different sizes, itl is desirable that the speed and powerapplied should be varied; for example, for drilling large holes a .lowspeed .and high power is desirable while for drilling small holes, thedrill should be driven at high speed and low power. For this purpose, Iprovide a set of interchangeable gears (see Figs. 2, 3 and 4) comprisingthe beveled gears 41 and 42, which are of the same size, and a thirdsmaller beveled gear 43. These gears are removably held in place uponthe upper end ofthe counter-shaft 26 and upon the driving or crank shaft31 by keys 44 having oH-set portions 45 on their ends by which they maybe readily removed from position with a vscrew driver, or other suitabletool.`

Then the drill is to be driven at medium speed and with medium power fordrilling medium sized holes, the beveled' gears 41 and 42 that are ofthe same size, are fixed" respectively to. the drive shaft and to theupper end of the counter-shaft 26, as shown in F12. For driving thedrill with low powerand high speed, the small gear 43 is fixed upon theupper end of the countershaft 26 and one of the large gears 41 is fixedto the drive shaft (see Fig. 3). For low speed and high power fordrilling large holes, the large gear 41 is fixed to the counter-shaft 26and the same gear 43 to the driving or crank shaft 31, as shown in Fig.4. In makingI the change from one' setof gears to another, the keys 44are removed tio loosen the gears4l and 43 and the crank shaft 31 maythen be withdrawn end-wise and the gears easily removed. The desired setis then placed in position and the drive shaft 31 thrust end-wise backinto place and the keys inserted to rigidly connect the gears to thedriving and counter-shafts. Where gears 4l and 42 of equal size areemployed, they abut in operative position against the bosses 30 and 32as shown. Then the small gear 43 is fixed to the end of thecountershaft, it abuts against the boss 30, as shown in Fig. 3, then tobring the large gear 41 in proper relation to the small gear, a washer46 is interposed between the large gear 41 and the boss W'hen the smallgear 43 is mounted on the drive shaft (see Fig. 4) it abuts in operativeposition against the boss 32 and the washer 46 is interposed between theboss 30 andV the large gear 41, so as to bring the latter in properrelation with the small gear. By thus providing three interchangeablegears and the interchangeable washer 46, the connecting gearing may bereadilyarranged to drive the drill atl three different speeds and withthree different powers.

With a machine of this sort, it is usual to drill a large number ofholes of the same size so that the interchanging of the gea-rs, whilereadily accomplished, need not be made except at. infrequent intervals.

The hub of the beveled gear 24 (see Figs. t "1 and 2) is provided withan eccentric 47 that is arranged to engage an arm 48 on a rock shaft 49.The latter is journaled in the end bar 11 and in the inner cross bar 14.A spring 50 (see Fig. 6) is coiled aboutI the shaft 49 and is secured atone end tothe shaft and at its other end to one of the side bars 10.This spring holds the arm 48 into engagement with the operatingeccentric 47. The rear end of the rock shaft 49 is provided with a bentarm 51 that carries the operating lpawl or pawls for driving the feednut 20.

Three different feeds are preferably employed in accordance with thespeed Aat which the drill stock is driven. For this purpose, the nut 20is preferably provided withthree setsl of ratchet teeth 52 of differentsizes. If desired, three separate ratchet nuts may be employed, butlthey shouldbe connected to-rotate together and preferably they are allformed in one piece, as shown. The arm 51 on the rock-shaft.. 49 carriesthree pawls 53 that are swiveled upon the horizontal portion of lthe arm51. and held in place thereon by a nut 54. These pawls are of differentlengths and arranged tocooperate with the three lsetsfof ratchet teeth52, the longest pawl being arranged to engage the smallest ratchetandthe shortest..

ratchet.

In operation, one of the feedpawls will held againei long-fitta th tinga he thrown into engaginient while tivo oi' the. pan are oi t wat. a"hovn drill ia il L n ai nie;

feed. 'With the lon apt i mverot' the drillatoelt the largeat iatrhetand itapaivl are employed for etterting! a relative low tend, and forniedinni speed and, :not uni feed, the intermediate ratrhet and paal areneed. Ein-ing the operation o: 'whine in drilling a hole, the lern :wwwi is held against revolution hy means ot a` dog 55 that if; arranged toengage a longitudinal kevway 5G in the meren', Dog is pivoted lietweenparallel lugsl or ahutrnenta 5T on'tlie rear Creer: liar l and hoera2:2, and in itl ilprightportion shown in luga. t? end ot' the dogengages the key-way 56 to hold the screw against rotation, and Stated,this is the position in which the dog ie plat-ed during the drillingoperation. 1When the dog' Shifted to horifontal posh tion .shown inltig. 7,it ia thrown ont. of engagement with the sereiv and ite: othereno is arranged to engage one ot'a series of notches 5S termed in theedge ot the disk orhoss 59 on the face of the rairhet nut 2t), ao that,in this poaition of the dog, the ratrhet nut will loe held againatrevolution.'

the

A@ Shown in Fig, 7, the tatie of the ratrhet not having the notrheddial; 59 is re-eeseed. hut this ia not esaential ai: the notched diszkmay.. if desired, project bevond the fatte of the nut. l:"Vhen the nuttitl is held against rewdution liv the dog 55, the sere-vv l? may heturned to quickly advance or retrart the drill to and *from the rail hymeans ot' a :mall rranlt hai'nlle tilt that is preferably reil'iov'-,alilv fitted livr-r the mtiaref'l end portion (El of the www', lt willlie eeen that the dog 35 torn. a simple eontrivaiwe by whirl; either thefee-1l aerea' or not nare he held asiziinfst rettili than for thedrilling operation,

and 5, one l and silly advancing and retraeting i rail, lint the doo ioioj; one oiA tia-ae 3.1; van he ,v .nr-'t revolution so that 'there nodangri of breaking anyy of the 'parte of the inaehiize thi-r1., theoi'irraton ot the driving or eranlt sha lit.

lt is/ohviona that.numerous changea niav he iliade in the detalla o1"struetnre without departure from the eeeentialsof the invern tion as seti'ifrih in the appended claims.

llaving fleafrihed niv invention, what l iflaiin ie nen and delire tosentire hy liiettera llatent, if-"- l. ln itx/fia the drill ath andgearing f f aid #hai ad Steele, ot atta-fl .fa rf heil im. inrit nl. ionand swiveled to ,sani einen., a not. on said arrew ino vein ent. a neli.

. i writting orante-allait,

having a ,plurality of ratehetsl of different antes, a plurality ofpavvls shiftable-into and onty of engagement with their respectiveratehete, and means driven from said crankaha'tt. for actuating saidp'awls, substantially deerrihed.

2. in track drills, the Combination with the drill atoek andcrank-shatt, of a feed srreiv held against rotation and swiveled'to Saidatoelt. a nut on said screw held against longitndinal movement andhaving a pluraL ityY of ratrhets of ditferent Sizes, a plurality otpaivle for said ratehets, and. a pa-Wl actnator driven from said crankshaft, .said paWlS being pivotally mounted upon said actuator' to shiftinto and outv of 'engagement with their respective ratehets,substantially dest-.ribed 3. ln track drills. the combination with thedrill stock', of a feed screw held againsty longitudinal rotation andSwiveled to Said steelt, a. nut on saidserew held against longitudinalmovement and having a plural-ity of ratehetsnf different sizes, a roel(Shaft, a earn on said drill stoel; for operating said rock shaft, an armon said Shaft and a pluralitvv ot parvis pivotally mounted on saidarnito .shift yinto and out of engagement with their respet'tiveratchets, substantially a5 described., y

4. ln track drills., the combination wit-l1 a drill stock, ofa feedarrevi' .swiveled to l@aid drill stonk, a nut on said feed screw, meansktor positively locking either said nut or Said aerea* against rotationand separate actuat-r ing devices for positively rotating Said. nut andsaid screw, suhatantially as described.

5. in trark drills` the f folnliination with a drill Storti. ot' ateedscrew ewiveled thereto, a nut on aaid teed screw, a Common lockingdevice tor aaid nut and ,said Screw arranged in one poaitiirn topositively loelt one of said parte againt rotation and leaving the otherot' said part` tree to rotate and means for roniting the unlocked one ofSaid parts, subatantially described.

(i. ln ti'aek drills, the combination with a drill stock and operatingmeana therefor, of a feed sri-ew siviveled to Said stock, a nut thereon,a pivoted dog for lotlting either 115 said, screw or :said nut againstrotation and means tor rinating the. unlorlted part and to etlieet thequick or slow feed ot' said drill ltorle Suhatantially as described.

'.7. ln track drlllS, the eon'ihination with a 120 pawl arranged toengage. either said liev- 125 way or said notehed disk to lock eithersaid Screw or said nist against rotation, and moana for rotating theunhazlwd part, Substantially as deseri ,ed.

8i ln trank drills. the combination with a 130 f {mw} auf?.ratchetmechansm for actuating said nut and an operating Yank handle forg said Screw, substammly as drsrxbed.

AARN R. PAUL 3S.

d'l sh .k e si Opm-ating Imam hervf r of a edfairev; svveied'to sfxiistof sufi 'nav-f ing a, ongitrfdal key-Way, a nut am Said screw having':L notched disk 01; shouder, a l pivoted dog aange to engage either sad'Wnesseot l LALLMN PREN'HCE, i

key-Way ur said notched disk tc lock either HARRY L. CLAPP.

:said screw or gad put against rotation, a

